摘要
扩建网极大验后估计模型蕴含联系参数X2和扩建网观测量L2两个方差分量。将联系参数分解成函数不独立部分和函数独立部分，根据限制条件求出函数不独立部分代入扩建网观测方程消去不独立部分联系参数，推导了联系参数函数不独立扩建网极大验后估计的Helmert型、Welsch型和Forstner型方差分量估计。
The model of the maximum posterior estimation used to extended network contains two kinds of variance components from connected parameters X2 and observations L2. This article, applying the new method that the functionally correlative connected parameters in the observation equations in extended network have be eliminated by using constraints, drives its estimation formulae of Helmert type, Welsch type,Forstner type for variance component.
出处
《测绘工程》
CSCD
1999年第2期5-10,共6页
Engineering of Surveying and Mapping
关键词
联系参数
限制条件
函数不独立
方差分量
测量
Connected parameters
Constraints
Functionlly correlative
Variance components
